ATI:Radeon 9700 Pro带宽为174.6GB/s-快科技-科技改变生活

ATI:Radeon 9700 Pro带宽为174.6GB/s

Rookie
2002年11月28日 16:29
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噢,My god,ATI放卫星说R9700 Pro的内存带宽高达174.6GB/s,远远超过了GeForce FX的48GB/s!

Inquirer:

"就我们所知,NVIDIA使用了3:1或者4:1的压缩方法,这使得最佳应用时带宽为48GB/s.

所以:500MHz x 2 (DDR) x 128bit (16bytes) x 3X 压缩 = 48 GB/s

而ATI则声称同时使用了颜色压缩和Z压缩,所以:

310MHz x 2 (DDR) x 256bit (32 bytes) = 19.8 GB/s

上面是没有压缩时的内存带宽,而ATI声称Radeon 9700 PRO使用了8.8:1压缩,所以你可以获得令人震惊的174.2GB/s带宽:

310MHz x 2 (DDR) x 256bit (32 bytes) x 8.8X 压缩= 174.2 GB/s..."

hmm,这样算来,Radeon 9700 Pro的性能是Geforce FX的三倍!?理论,理论,理论不等于实际...

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